The following functions are mainly used to move the array pointer and push in and pop out array elements.
Function | Function |
---|
##array_shift | Pop array The first element in |
array_unshift | Push the element at the beginning of the array |
array_push | Push elements to the end of the array |
array_pop | Pop the last element at the end of the array |
current | Read the value of the current position of the pointer |
#key | Read the key of the current position of the pointer |
next | Move the pointer down |
prev | Move up |
reset | Pointer to the beginning |
end | Pointer to the end |
array_shift
##mixed array_shift ( array &$array )
Function: Pop the first element in the array<?php
$mingren = array("邓超", "黄晓明", "宁泽涛", "钟汉良");
$dc = array_shift($mingren);
echo $dc .'<br />';
print_r($mingren);
?>
Execution result:
Conclusion: 1. Pop out the first array element, changing the result of the original array 2. The pop-up value is assigned to $dcarray_unshift
int array_unshift (array &$array, mixed $value 1 [, mixed $... ] )
Function: Push one or more elements to the beginning of the index array, and return the total number. <?php
$mingren = array("邓超", "黄晓明");
$dc = array_unshift($mingren , "宁泽涛", "钟汉良");
echo $dc .'<br />';
print_r($mingren);
?>
The execution results are as follows:array_pop
mixed array_pop (array &$array)
Function: pop up an element at the end of the array<?php
$mingren = array("邓超", "黄晓明", "宁泽涛", "钟汉良");
$dc = array_pop($mingren);
echo $dc .'<br />';
print_r($mingren);
?>
Execution result:
array_push
##int array_push ( array &$array , mixed $value1 [, mixed $... ] )Function: Push one or more elements to the end of the index array, and return the total number.
<?php
$mingren = array("邓超", "黄晓明");
$dc = array_push($mingren , "宁泽涛", "钟汉良");
echo $dc .'<br />';
print_r($mingren);
?>
Execution result:
#current,key,prev,next,reset function demonstrationThe functions of these functions have been explained very clearly. We demonstrate through code:
<?php
$t=array(
'我们',
'yy'=>'永远',
'dbg'=>'需要不断奋进',
'djn'=>'才能开创未来'
);
//读取数组的值
echo current($t).'<br />';
//读取数组的键
echo key($t).'<br />';
//向后移动一下
next($t);
//再读值和键
echo current($t).'<br />';
echo key($t).'<br />';
//向后移动一下
next($t);
echo current($t).'<br />';
echo key($t).'<br />';
//向前移动一下
prev($t);
echo current($t).'<br />';
echo key($t).'<br />';
//移到末尾
end($t);
echo current($t).'<br />';
echo key($t).'<br />';
//移至开始处
reset($t);
echo current($t).'<br />';
echo key($t).'<br />';
//销毁数组
unset($t);
var_dump($t);
?>
Next Section<?php
$t=array(
'我们',
'yy'=>'永远',
'dbg'=>'需要不断奋进',
'djn'=>'才能开创未来'
);
//读取数组的值
echo current($t).'<br />';
//读取数组的键
echo key($t).'<br />';
//向后移动一下
next($t);
//再读值和键
echo current($t).'<br />';
echo key($t).'<br />';
//向后移动一下
next($t);
echo current($t).'<br />';
echo key($t).'<br />';
//向前移动一下
prev($t);
echo current($t).'<br />';
echo key($t).'<br />';
//移到末尾
end($t);
echo current($t).'<br />';
echo key($t).'<br />';
//移至开始处
reset($t);
echo current($t).'<br />';
echo key($t).'<br />';
//销毁数组
unset($t);
var_dump($t);
?>
- Chapter1Why choose this course to learn PHP
- Why learn PHP?
- What is PHP
- You can learn even with z...
- Why can't some people lea...
- Chapter2PHP environment installation
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- Chapter3php basic syntax
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- Chapter6PHP arrays and data structures
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- php array definition
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- Chapter12Getting started with MySQL
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- Mysql connect to database
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